I have made a textual minesweeper game (here you can find the program). I want to initialize some data by the help of a file. The file should be readable for humans and easy to modify with a simple text editor. The file should look for example like this and it should allow comments:

# columns and rows
# describes how the field is selected
# 1 - <o x x> (for example e 5 7 which means explore field with coordinates 5 7)
# 2 - easy entering format
format: 1 
# possibility that a field is bombed (1 / possibility)
possibility: 8

In which part of the program and in which manner should I read such a file? What is the most efficient way to read such a file? Thank you for all answers!

closed as too broad by TheCatWhisperer, gnat, Laiv, amon, Andy Hunt Mar 8 '18 at 12:10

Please edit the question to limit it to a specific problem with enough detail to identify an adequate answer. Avoid asking multiple distinct questions at once. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.

  • Could someone tell me why my question has got a downvote? – Henry Weinert Feb 28 '18 at 13:17
  • 1
    this question is very broad, and seems like a homework question. – TheCatWhisperer Feb 28 '18 at 13:25
  • perhaps it would behoove you to go to interpersonal.stackexchange.com and ask how to effectively express disagreement, and how to not take criticism of your question as a personal attack. Hope you have a good day, best of luck with your software engineering endeavors :) – TheCatWhisperer Mar 1 '18 at 22:00

Raw Java world uses Java propeties format to handle similar configuration tasks. Dedicated class Properties makes this trivial.

 try(Reader reader = Files.newBufferedReader(Path.get("config.properties"), StandardCharsets.UTF_8)) {
     Properties properties = new Properties();
     int size = Integer.valueOf(properties.getProperty("size"));
     int format = Integer.valueOf(properties.getProperty("format"));
  • I agree. Why reinvent the wheel? – Neil Feb 28 '18 at 13:06
  • 1
    If you dont like properties there is still yaml, json, xml ... all of which wont re-invent wheels though some might need external libraries. – Newtopian Feb 28 '18 at 14:35
  • XML, YAML, JSON model tree structures, while OP requests a key-value storage, which is a simpler subset. – Basilevs Feb 28 '18 at 15:48

if you use Java (and you do), work with Spring. it makes your life so much easier in such cases!

and specifically in this case, you just use something like

    location="classpath:default.properties" />

and you have all the properties ready for use (it reads everything upon startup)

  • 5
    For the OP's needs, Spring is like using a cannon on a squirrel. Heavy to lift, hard to aim, and leaves a mess behind. – BobDalgleish Feb 28 '18 at 13:25

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